There’s a reason this seven-piece, horn-centric, rock and boogie band has hammered an exclamation point on the end of its name. A Band Called Truman! has been staging sharp, intense and exclamatory original music for 15 years and has built a large, loyal audience it affectionately describes as “local goofballs.” Led by tireless frontman Leon Rohrbaugh and his baby blue hollow body guitar, the group includes a rhythm section held down by Ian Connell on drums and John Erickson on bass, with Jim Pospisil on keys and a powerhouse horn section that includes Dale Shimmin, Kelli Hallsten and Jessica Lilja Olson.